| 摘要 |
PROBLEM TO BE SOLVED: To increase the strength of a heat insulation casing by firming the mounting of a front plate, covering the front of the partition body of an inner box, on the side plate of an outer box. SOLUTION: A step is formed in the side of a front plate 10 to form a flange 10a making contact with a back flange 2c of a side plate 2a, a protrusion part 10c having a screw hole 10b making contact with the back of a front flange 2b and having a screw hole 10b is formed on the flange 10a and meanwhile, and a through-hole 2e positioned facing the screw hole 10b is formed in the flange 2b. An opening part 2f into which the protrusion part 10c is inserted is formed in the back flange 2c. The front plate 10 is fixed at the front flange 2b of the side plate 2a by a screw 12 inserted in the through hole 2e from the front of the front flange 2b and mounted in the hole 10b for screw locking.
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